Future World Records without drugs

We decellerate slightly as the outside of our foot contacts the ground, and we produce a ground force reaction from which we acellerate off the ground with the inside of the foot. It's actually impossible to do this unless you touch down slightly in front of your center of gravity, otherwise how would you be able to do all that work with your feet and muscles in such a short space of time?

seems wrote:

Your just saying things. No he cares what you "think". Show us facts. Why would upright be most efficient?

What is so special about leaning forward? Why do people preach that? Some very fast runners do lean forward, and it might help when running into the wind, but more top runners have an upright stance, check it out.

I suppose I will have to get the book won't I. But this idea that slow low mileage runners land way in front of their center of gravity, and that they need to correct this is just nonsense. It's biomechanically impossible to do that because running is a balancing act we naturally learn very young.

I still recommend it to you, for all the reasons I've explained in the past. I think he does a better job of explaining some of the things I think you want to say.I see in the past you also didn't like "compactness", claiming it was bio-mechanically impossible to overstride. I'm not sure why you reject photographic (and previously video) evidence. But don't you think that it might be possible to learn bad habits by retraining our gait from what we have learned when we were very young (say for example if someone recommends increasing your stride length to increase performance, and we force the change).In the hypothetical case that overstriding could exist, would you at least agree that if we did overstride, the resulting imbalance, and the extra energy required to maintain balance and stability, would cause us to be uneconomical (due to couter-productive braking), inefficient (extra energy required for balance), and potentially lead to higher risk of injury?

jono wrote:

I suppose I will have to get the book won't I. But this idea that slow low mileage runners land way in front of their center of gravity, and that they need to correct this is just nonsense. It's biomechanically impossible to do that because running is a balancing act we naturally learn very young.

I'm saying overstriding doesn't exist because it's biomechanically impossible to overstride unless you are doing it deliberately to slow down such as on a steep downhill. The mythology is just another example of collective wisdom that is

This idea that slow, low mileage runners overstride is nonsense. But to put this into context, we all land very slightly in front of our center of gravity and the faster you run, the smaller that margin is. The amazing balancing act of bipedal running is our genetic heritage, a neuromuscular skill that almost everyone has. Those unfortunate enough to have some disease of the central nervous system obviously have less or none of this ability.

jono wrote:

seems wrote:

Your just saying things. No he cares what you "think". Show us facts. Why would upright be most efficient?

What is so special about leaning forward? Why do people preach that? Some very fast runners do lean forward, and it might help when running into the wind, but more top runners have an upright stance, check it out.

Again, you're just making things up. Just because more runners run a certain way (again something that you probably made up) doesn't mean that it's better. So explain why running upright is better than leaning forward.

jono wrote:

...otherwise how would you be able to do all that work with your feet and muscles in such a short space of time?

Why wouldn't we be able to do "all that work" in such a short space of time?

seems wrote:

Again, you're just making things up. Just because more runners run a certain way (again something that you probably made up) doesn't mean that it's better. So explain why running upright is better than leaning forward.

Again you're just trolling.

look it up wrote:

jono wrote:

...otherwise how would you be able to do all that work with your feet and muscles in such a short space of time?

Why wouldn't we be able to do "all that work" in such a short space of time?

Ground contact time is more or less proportional to pace.

Here is actual footage of 4 participants in the 2009 Manchester City Marathon/Half Marathon arriving at around 10K at the same time:http://www.youtube.com/watch?v=s24UGP3oBegWhat do you think of runners 2 and 4? Do you think they are maximizing energy return compared to runners 1 and 3?

jono wrote:

I'm saying overstriding doesn't exist because it's biomechanically impossible to overstride unless you are doing it deliberately to slow down such as on a steep downhill. The mythology is just another example of collective wisdom that is

This idea that slow, low mileage runners overstride is nonsense. But to put this into context, we all land very slightly in front of our center of gravity and the faster you run, the smaller that margin is. The amazing balancing act of bipedal running is our genetic heritage, a neuromuscular skill that almost everyone has. Those unfortunate enough to have some disease of the central nervous system obviously have less or none of this ability.

The second runner??? He's a stooge isn't he?

Did you catch this great form analysis of Bekele, Geb, and Farah?http://balancedrunner.co.uk/running-form-comparison-between-bekele-gebrselassie-and-farah-in-the-2013-great-north-run/Here you can see an example of a forward lean from the two Ethiopians, versus the more upright stance of Farah, and the comment that this forces Farah to use more strength, rather than economy, to perform his best.Note too, the general concern about overstriding. Bekele, Geb, and Farah are not, but apparently it does happen: "If a runner is overstriding in a meaningful way, their hip joint will be behind the ankle in midstance."

jono wrote:

I don't like this 'below the center of gravity landing' stuff. There is no other way to run if you think about it. We all learn this as a basisc skill before we are two years old. It's like telling people to breathe in and out.

And I don't agree with forward lean either. I don't think that is good biomechanics. Upright stance is the most efficient for maintaining speed.